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Unravelling Nature's Networks

Signalling networks, inflammation and innate immunity

S.K. Dower, E.E. Qwarnstrom
Biochemical Society Transactions Dec 01, 2003, 31 (6) 1462-1471; DOI: 10.1042/bst0311462
S.K. Dower
Academic Unit of Cell Biology, Section of Functional Genomics, Division of Genomic Medicine, University of Sheffield, Royal Hallamshire Hospital, Glossop Road, Sheffield S10 2JF, U.K.
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E.E. Qwarnstrom
Academic Unit of Cell Biology, Section of Functional Genomics, Division of Genomic Medicine, University of Sheffield, Royal Hallamshire Hospital, Glossop Road, Sheffield S10 2JF, U.K.
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Abstract

We have been analysing the signalling systems that couple to receptors of the TIR (Toll/interleukin-1 receptor) family, which signal through a common cytoplasm region; the TIR domain. These systems are of both practical and fundamental biological significance, being central to the pathogenesis of chronic inflammatory diseases such as atherosclerosis, to host defence throughout the biological world, and are ancient in the context of life on earth, having originated more than 1 billion years ago: prior to the divergence of plants and animals. TIR domain receptors couple to at least two sets of well-characterized pathways: those leading to the activation of inhibitory κB kinase complexes/nuclear factor κB, and those leading to the activation of mitogen-activated protein kinase/AP-1/ATF-2 etc. We have been investigating these systems using a combination of expression screening methods to identify new components, and real-time green fluorescent protein-based techniques to observe execution of signalling programmes in real time. Our data reveal that there is a very large level of cell-to-cell variation in signal programme execution even in clonal populations and that at least one mechanism for dealing with this heterogeneity is the assembly of signal transduction components into large multiprotein complexes.

  • green fluorescent protein
  • immunity
  • inflammation
  • networks
  • signal transduction

Footnotes

  • Unravelling Nature's Networks a Biochemical Society Focused Meeting held at University of Sheffield, 21 July 2003

  • Abbreviations used: TIR, Toll/interleukin-1 receptor; NF-κB, nuclear factor κB; IL, interleukin; IL-1R, IL-1 receptor; I-κB, inhibitory κB; IKK, inhibitory κB kinase; MAPK, mitogen-activated protein kinase; EGFP, enhanced green fluorescent protein; DD, death domain; ERK, extracellular-signal-regulated kinase; JNK, c-Jun N-terminal kinase; FRET, fluorescence resonance energy transfer; AcP, accessory protein; ODE, ordinary differential equation; IRAK-1, IL-1-receptor-associated kinase; TAK-1, transforming growth factor β-associated kinase; TAB, TAK–binding protein; MKK, MAPK kinase; MKKK, MKK kinase.

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December 2003

Volume: 31 Issue: 6

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Signalling networks, inflammation and innate immunity
S.K. Dower, E.E. Qwarnstrom
Biochemical Society Transactions Dec 2003, 31 (6) 1462-1471; DOI: 10.1042/bst0311462
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Signalling networks, inflammation and innate immunity
S.K. Dower, E.E. Qwarnstrom
Biochemical Society Transactions Dec 2003, 31 (6) 1462-1471; DOI: 10.1042/bst0311462

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Keywords

green fluorescent protein
immunity
inflammation
networks
signal transduction

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